Question about Sierra Wireless Modems

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Sierra Wireless 881U won't connect

I've got a Sierra Wireless 881U that I'm using with a HP Pavillion DV6000.  I'm running Windows Vista Home Premium.  I've been using the cell modem for about two months.  Then all of a sudden it won't connect to the internet.  Sometimes it shows a local connection.  At other times it shows that it is connected,, but the browser can't open a page.  When I click repair for the connection, it says the IP address is wrong.  I've gone through three tiers of tech support with AT&T.  They don't have a clue and say the problem is most likely with my computer.  Drivers and firmware are up to date.  Any suggestions.  Thatks.

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  • bob62901 Sep 25, 2008

    No, I didn't try that.  I replaced the SIM card and that didn't help.  I then swapped my 881U for a friend's  His worked perfectly on my computer, but mine wouldn't work on his computer. This indicated a hardware problem in the modem itself.   AT&T replaced my unit and the new one works flawlessly.  Thank you for your suggestion!


1 Answer

Have you tried to run a Winsock reset in Vista to flush winsock catalogs pertaining to the IP addresses?

Posted on Sep 25, 2008

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